Your water looks OK but still something has changed. Why have the fish stopped eating?

If the water has not changed something else has, and it is imperative that we figure out what. Any time fish go without eating (several weeks) irreversable damage take place and the fish cannot be saved so getting them eating again is important._________________wirehair

Keeping these fish alive is important for more reasons than one. If the reasons the fish are not eating still exist when you put new fish in the container the same thing will happen. It is vital that whatever is causing the Goldfish to not eat be fixed before you put more critters in. So inorder to prevent any undue suffering to the existing fish and prevent new fish from getting the same thing it is important that any problem be fixed first. Re-homing the fish may be the safest bet. Anything to get them eating again would be a wise move as an interim measure._________________wirehair

Okay that makes sense. I can return them to the store (their return tank is 100 gallons and usually empty. Or I could give them to a neighbor who has a "Goldfish Tank" that is 55 gallons but it is horribly overstocked and has a heater and is not cycled and has dead fish for fertilizing the plants in the tank. Its discusting, I could also do a water change._________________Romeo! Juliet? No!